Patents by Inventor Johan E. A. Graae

Johan E. A. Graae has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Modular assembly of a photovoltaic solar energy receiver
    Patent number: 4118249
    Abstract: There is provided a modular assembly of a solar energy concentrator having a photovoltaic energy receiver with passive cooling. Solar cell means are fixedly coupled to a radiant energy concentrator. Tension means bias a large area heat sink against the cell thereby allowing the cell to expand or contract with respect to the heat sink due to differential heat expansion.
    Type: Grant
    Filed: August 30, 1977
    Date of Patent: October 3, 1978
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Robert M. Graven, Anthony J. Gorski, William W. Schertz, Johan E. A. Graae